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Prewarm txns in order (of processing) #7327

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merged 4 commits into from
Aug 14, 2024
Merged

Prewarm txns in order (of processing) #7327

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6ec7534
Prewarm txns in order
benaadams Aug 13, 2024
87db1c6
Skip prewarming if PhysicalCoreCount too low
benaadams Aug 13, 2024
878e21e
Add tx index to trace
benaadams Aug 13, 2024
64189d3
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benaadams Aug 14, 2024
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36 changes: 27 additions & 9 deletions src/Nethermind/Nethermind.Consensus/Processing/BlockCachePreWarmer.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -54,9 +54,15 @@ private void PreWarmCachesParallel(Block suggestedBlock, Hash256 parentStateRoot

try
{
var physicalCoreCount = RuntimeInformation.PhysicalCoreCount;
if (physicalCoreCount < 2)
{
if (_logger.IsDebug) _logger.Debug("Physical core count is less than 2. Skipping pre-warming.");
return;
}
if (_logger.IsDebug) _logger.Debug($"Started pre-warming caches for block {suggestedBlock.Number}.");

ParallelOptions parallelOptions = new() { MaxDegreeOfParallelism = Math.Max(1, RuntimeInformation.PhysicalCoreCount - 2), CancellationToken = cancellationToken };
ParallelOptions parallelOptions = new() { MaxDegreeOfParallelism = physicalCoreCount - 1, CancellationToken = cancellationToken };
IReleaseSpec spec = specProvider.GetSpec(suggestedBlock.Header);

WarmupTransactions(parallelOptions, spec, suggestedBlock, parentStateRoot);
Expand All @@ -74,13 +80,18 @@ void WarmupWithdrawals(ParallelOptions parallelOptions, IReleaseSpec spec, Block
if (parallelOptions.CancellationToken.IsCancellationRequested) return;
if (spec.WithdrawalsEnabled && block.Withdrawals is not null)
{
int progress = 0;
Parallel.For(0, block.Withdrawals.Length, parallelOptions,
i =>
_ =>
{
IReadOnlyTxProcessorSource env = _envPool.Get();
int i = 0;
try
{
using IReadOnlyTxProcessingScope scope = env.Build(stateRoot);
// Process withdrawals in sequential order, rather than partitioning scheme from Parallel.For
// Interlocked.Increment returns the incremented value, so subtract 1 to start at 0
i = Interlocked.Increment(ref progress) - 1;
scope.WorldState.WarmUp(block.Withdrawals[i].Address);
}
catch (Exception ex)
Expand All @@ -98,29 +109,36 @@ void WarmupWithdrawals(ParallelOptions parallelOptions, IReleaseSpec spec, Block
void WarmupTransactions(ParallelOptions parallelOptions, IReleaseSpec spec, Block block, Hash256 stateRoot)
{
if (parallelOptions.CancellationToken.IsCancellationRequested) return;
Parallel.For(0, block.Transactions.Length, parallelOptions, i =>
{
// If the transaction has already been processed or being processed, exit early
if (block.TransactionProcessed >= i) return;

int progress = 0;
// We want to start at 1 which is the second transaction, giving total count one less than the length
Parallel.For(1, block.Transactions.Length, parallelOptions, _ =>
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{
using ThreadExtensions.Disposable handle = Thread.CurrentThread.BoostPriority();
Transaction tx = block.Transactions[i];
IReadOnlyTxProcessorSource env = _envPool.Get();
SystemTransaction systemTransaction = _systemTransactionPool.Get();
Transaction? tx = null;
try
{
// Process transactions in sequential order, rather than partitioning scheme from Parallel.For
// Interlocked.Increment returns the incremented value, so it will start at 1
int i = Interlocked.Increment(ref progress);
// If the transaction has already been processed or being processed, exit early
if (block.TransactionProcessed > i) return;

tx = block.Transactions[i];
tx.CopyTo(systemTransaction);
using IReadOnlyTxProcessingScope scope = env.Build(stateRoot);
if (spec.UseTxAccessLists)
{
scope.WorldState.WarmUp(tx.AccessList); // eip-2930
}
TransactionResult result = scope.TransactionProcessor.Trace(systemTransaction, new BlockExecutionContext(block.Header.Clone()), NullTxTracer.Instance);
if (_logger.IsTrace) _logger.Trace($"Finished pre-warming cache for tx {tx.Hash} with {result}");
if (_logger.IsTrace) _logger.Trace($"Finished pre-warming cache for tx[{i}] {tx.Hash} with {result}");
}
catch (Exception ex)
{
if (_logger.IsDebug) _logger.Error($"Error pre-warming cache {tx.Hash}", ex);
if (_logger.IsDebug) _logger.Error($"Error pre-warming cache {tx?.Hash}", ex);
}
finally
{
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